Top each pepper triangle with approximately 2 tablespoons rice mixture; sprinkle with Cheddar cheese. Place on prepared baking sheets; cover with plastic wrap. Refrigerate up to 8 hours before serving.

When ready to serve, preheat broiler. Remove plastic wrap. Broil nachos, 6 to 8 inches from heat, 3 to 4 minutes (or bake at 400°F 8 to 10 minutes) or until cheese is bubbly and rice is heated through. Transfer to serving plate and garnish, if desired.